Charles David Rainey (born July 14, 1954) is an American former professional baseball player who pitched in the Major Leagues from 1979 to 1984.

He spent four seasons on the Boston pitching staff before being traded to the Chicago Cubs for Doug Bird in December 1982.

On August 24 of that year, against the Cincinnati Reds at Wrigley Field, he had a no-hitter broken up with two out in the ninth by an Eddie Milner single, the only hit Rainey would allow in a 3–0 Cub victory.

Midway through the 1984 season Rainey was traded (along with a player to be named later) to the Oakland Athletics for Davey Lopes.

This biographical article relating to an American baseball pitcher born in the 1950s is a stub.